nanoCAD is a proprietary basic computer-aided design system for Windows designed for the development and release of working documentation (drawings), developed by the Russian company Nanosoft. There is both a commercial version (nanoCAD Plus) and a free version (nanoCAD). Has an AutoCAD-like interface and directly supports the DWG format (via Teigha libraries, developed by the Open Design Alliance). Belongs to the class of CAD platforms, since it contains and develops, first of all, basic classical CAD functions, and on its basis, through an open API, specialized applications can be created to perform various highly specialized design tasks (mechanical engineering, construction, engineering, land management, etc.).